Lavrov's visit comes amid a flurry of diplomatic activity to organise next month's summit, with US Secretary of State Mike Pompeo also meeting Kim's right-hand man Kim Yong Chol in New York late Wednesday.

"Sergei Lavrov, foreign minister of the Russian Federation, arrived here on Thursday at the invitation of Ri Yong Ho, foreign minister of the Democratic People's Republic of Korea (North Korea)", KCNA news agency said in a brief dispatch.